Micrometer-gage.



W. wmsom. MICRDMETER GAGE.

APPLICATION FILED JULY 3, 191B.

Patented. Nov. 5, 1918.

the gage that 'rnusrnn, or onnvntann,

WILLIAM warson, or riannronflnnw annsnrgnssienon no nanrn n. nosnitr-nnn,

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iaIonoMnrnn-eaen Specification of Iletters Patent.

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Application filed July 8, 1216. Serial No. 108,175.

To alltahqm itmcyconcern:

e t kno n ha 1, WILLIAM WA ON, a citizen of the 'United States, residingat Tre n, in the un y of naerd S at of New J r ey, h ei v n d r a n new Gages, of w ch th fo low gs a 14 .11 ear and."exac de r ptiw, r feren e being; ha

and useful Improvement, in Micrometerto th accomp ny ng d awingst be longit din l y a j s d t m asur a ne the ax s distances by means of micrometer, at tac ment, T e. case h s body por adapted to stand on plane surfaces or on cylindri l sur n su h a m nner a to o h s g with the a o he cylindr c l sur a e, ri t and b at c t the ays or sh rs f a at e he e y it may ac as a stop, or the c rr ge; proi ng for a cur adiustm i sflo i p sit on of he a age and c re p d e it amo ts of mo ement r dept 0 u to be ake y the as:

7 My invention is hereinaftermore fully dcscribed n connec n iththe dra in d its essential characteristics are summarized n h cl ms In the d ti n of mi me er s We 2 is elevat on o th e: Fia i a ti al substan ially axi s et on hro the gage; and Fig. 4 isan elevation of the end opposite that shown in Fig.2. Inthe above figures, Fig. 1 illustrates the device in a position resting on aplane; Fig. 2 illnstrates its use on a cylindrical surface, and

Fig, 4: illustrates its use on the guides or ways oif a lathe or planeror like structure.

Referring to thedrawings numerals, 5 indicates a body member having flat plane surfaces 6 adapted to rest on any plans, as

indicated by the broken line The body a a the end of ofthe body 5 flange or skirt rawings, Figure l is a side elevaportion is shown as having parallel end surfaces 8 and 9. In the surfaces provided a circular depression 10 in which is seated an utward y n i sfi' iie'el f 101- low distance member 12, shown as a bonnet having a convex outer end 14; formingan abutment adapted to rest against any sura t be e ur f om: The f n e 11 is o n a emo a y s e e i he depression 1Q by screws 15 or other suitable means,

hu permit in th S a distance. p ece 12 ebe h ne f ot distance was o any d s d, e gth x nd ng outwa d y, as n ica by broke l ne at In axial alinement with the distance piece 1 is a threaded opening shown as extending at provided with a convex abutment 22 or tool whose distance from the body or the member 12' is to be determined.

Rigid with the screw 20 an outwardly extending diskdike portion 23 having a knurled surface 24k at its periphery whereby the screw may be turned tovary the distance between the ends 22 and 14.

Extending outwardly from'the surface 9 is a rigid cylindrical extension 30, the outer surface of which is slidably and closely embraced by a cylindrical 25.. integral with the disk 23 andtheouter face of the inner end of which is beveled, as shown with an annular row of spaced graduation marks 28. These marks may be numbered at intervals, as shown at 29, on the outer surface of the skirt 25. On the surface of the extension ations on the skirt to determine the relative position of the screw with relation to the body. Thus, tion between the head of the screw and the body 5 may be determined as well as the dis tance between the ends 14 and 22, whereby the tool may be used for practically all purposes as an inside caliper in the other uses herein set forth; for example, the tool may be readilylused for-measuring the inside diameter of piston rings, bores of pistons, etc.

adapted to engage a surface at 26, and" provided 30 is a linear row of suitably j numbered graduations indicated at 32, which may be read in conmnction with the graduby these graduations, the relaaddition to 1 formed by aplaner,

and under such circumstances it is desir- In the lower portion of the body is a V- shaped' groove having sides 40 lying in planes parallel to the axis of the screw. This groove is adapted to position the device on cylindrical surfaces or on the ways of a lathe, planer or other tool, as will be hereinafter described.

To provide for clamping the body of the gage to a surface which it may fit, without injuring the body portion, I have provided a hardened tool steel member l5, shown as seated in a suitable cavity in the upper side of the'body and secured by rivets or like members, indicated at 46. The upper surface of this member is preferably a plane surface parallel with the surfaces 6, and the outerpla'ne of the member 45 is such a distanceifrom the axis of the screw that the device mayv rest on this plane or be positioned by it allowing the axis of the dis -tance members to stand closer to such plane under conditions where this is desirable. It will be noted that, by reason of the weight of the bodypor'tion and the center of gravity of the gage being above the base thereof, the gagemay stand on a plane or convex. surface without danger of tipping, which adds greatly to the convenience of using the gage. It will be seen from the foregoing description that Ihave provided a simple efficient measuring device which is adapted for many uses, a few of which will be herein after described to illustrate the purpose of my invention. It is frequently very desirable in machine work to measure distances between shoulders or between grooves being shaper or like tools,

a plane; Thus the surfaces 6 of the body yp'ortion may rest upon a plane just formed ber byzresting thereon,'as indicated in Fig. v2,

' by the tool, or upon 1;. gage may 45" the bed or table of the shaper, planer or milling machine. The be used to advantage on surface platfiasuch as are used for laying out wor r 1 The sides the groove 40 being in planes parallel to the axis of the distance pieces,

provides for positioning the axis of the gage parallel with the axis of a cylindrical memthe cylindrical surface being shown. in broken lines at 50. The sides of the cylinvdrical surface on which this groove may positionthe gage may. vary widely. This feature is very useful in lathe work and is 'an advantage on boring machines, drill press work and the like where the groove may position the gage either on the spindle of a machine or on work operatedvupon.

- a In, lathe work it is frequently desirable to move the carriage longitudinally of the ways a definite distance, thus so positioning the tool as to cuts. For example, if it is found thata cut face of the block eliminate a number of trial size, the gage may be clamped on the ways and the head 22 of the screw set against the tool carriage and then turned back ten thousandths (or any other desired number), the carriage then moved until it abuts the head, thus positioning the tool to take the finishing cut.

The groove in the body of my gage is preferably so shaped that it may fit the ways or shears of a lathe, indicated in broken lines at 55, and the age may be clamped in such a position y any convenient device. For example, I have shown a C-clamp 56, having one portion engaging the member 45 and its screw 57 engaging the under side of the ways. This is simply an example of many uses, as the'device may be clamped not only on the ways of a lathe, but also on those of a shaper or planer or on the cross head of a planer, whether such cross head is provided with raised shears or whether it presents a flat surface with the combination of a metal block having a base supporting surface with a longitudinal groove 1n it, said block having a threaded opening through itsv upper portion about an axis parallel with the supporting surface parts liable to get out of.

and having on one end of the block a cylindrical extension concentric with the axis of the screw threaded opening, a screw threaded into said opening and having a head provided with an outstanding cylindrical skirt overhanging the cylindrical extension of the block, said skirt being prov1ded with circumferential graduations coacting with longitudinalgraduations on the extension, and a bonnet secured to the other screw and furnishing a distance piece and a housing for the projecting end of the screw. 2. In a device of the character described,

. the combination of a block having a threaded opening extending entirely through it from one side to the other and parallel with the top and bottom faces, an integral sleeve concentric with the axis of the threaded opening on one side of the block, a separate hollow bonnet having a closed outer end and in axial alinement with the an external annular flange at its inner end,

1 ,aeaem said flange abutting and being removably secured to the other side of the block in axial alinement With the screw-threaded opening, a screw occupying said opening of the skirt With circumferential tions.

In testimony whereof, ll hereunto aflix my signature.

WILLIAM WATSON.

gradualvitnesses GRACE DORSETT, OLIVE GAULDERELL.

Uopiee of thin patent may be obtained for five cents each, by addressing the fiomiesfioner o1 Patemte,

' Washington, D. G." i 

